The Power cable and power adapter cable are 1.5M + 1.0M so 2.5 m total.
They can be extended just like any other power cable.
The speaker connection cable is 2 metres long. It can be extended using the following optional cables:
D3V Link Extension Cable (2m) | ADAM Audio Shop
D3V Link Extension Cable (4m / 13ft) | ADAM Audio Shop
The USB-C cable = 1.5M and can be extended just like any other USB-C cable.